Stuck-At Fault Tests in the Presence of Undetectable Bridging Faults

Undetectable bridging faults between two arbitrary leads, which may produce feedback loops, in a unate two-level irredundant AND-OR network are anlyzed and their effect on stuck-at fault detection tests is explored. As a result, any complete test set for single stuck-at faults proves to still remain valid in the presence of undetectable bridging faults.